ALPHA & OMEGA SEMICONDUCTOR LTD, 10-Q filed on 2/5/2026
Quarterly Report
v3.25.4
Cover - shares
 6 Months Ended
Dec. 31, 2025
Jan. 31, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Dec. 31, 2025  
Document Transition Report false  
Entity File Number 001-34717  
Entity Registrant Name Alpha and Omega Semiconductor Limited  
Entity Incorporation, State or Country Code D0  
Entity Tax Identification Number 77-0553536  
Entity Address, Address Line One Clarendon House  
Entity Address, Address Line Two 2 Church Street  
Entity Address, City or Town Hamilton  
Entity Address, Postal Zip Code HM 11  
Entity Address, Country BM  
City Area Code 408  
Local Phone Number 830-9742  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding (in shares)   29,760,825
Entity Central Index Key 0001387467  
Current Fiscal Year End Date --06-30  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false  
v3.25.4
CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Current assets:    
Cash and cash equivalents $ 196,340 $ 153,079
Restricted cash 425 419
Accounts receivable, net 29,017 34,772
Other receivables 1,756 1,700
Receivable from sale of equity interest in the JV Company 46,118 0
Inventories 200,102 189,677
Other current assets 10,372 18,215
Total current assets 482,374 396,162
Property, plant and equipment, net 310,961 314,097
Operating lease right-of-use assets 23,661 21,288
Intangible assets, net 1,288 269
Equity method investment 141,439 279,122
Deferred income tax assets 8,172 599
Other long-term assets 34,398 22,766
Total assets 1,002,293 1,034,303
Current liabilities:    
Accrued liabilities 57,825 59,027
Income taxes payable 4,370 1,790
Short-term debt 2,980 11,852
Deferred revenue 2,047 0
Finance lease liabilities 1,046 1,007
Operating lease liabilities 5,916 4,978
Total current liabilities 140,241 154,507
Long-term debt 2,113 14,872
Income taxes payable - long-term 4,351 4,201
Deferred income tax liabilities 12,423 13,192
Finance lease liabilities - long-term 742 1,274
Operating lease liabilities - long-term 18,461 16,925
Other long-term liabilities 5,194 7,000
Total liabilities 183,525 211,971
Commitments and contingencies (Note 12)
Preferred shares, par value $0.002 per share:    
Authorized: 10,000 shares; issued and outstanding: none at December 31, 2025 and June 30, 2025 0 0
Common shares, par value $0.002 per share:    
Authorized: 100,000 shares; issued and outstanding: 37,426 shares and 29,582 shares, respectively at December 31, 2025 and 37,127 shares and 30,009 shares, respectively at June 30, 2025 75 74
Treasury shares at cost: 7,844 shares at December 31, 2025 and 7,118 shares at June 30, 2025 (93,138) (79,058)
Additional paid-in capital 398,072 379,779
Accumulated other comprehensive loss (4,737) (12,390)
Retained earnings 518,496 533,927
Total Alpha and Omega Semiconductor Limited shareholder's equity 818,768 822,332
Total liabilities and shareholders' equity 1,002,293 1,034,303
Related Party    
Current liabilities:    
Accounts payable 16,920 15,809
Nonrelated Party    
Current liabilities:    
Accounts payable $ 49,137 $ 60,044
v3.25.4
CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 31, 2025
Jun. 30, 2025
Preferred stock, par value (in dollars per share) $ 0.002 $ 0.002
Preferred stock, shares authorized (in shares) 10,000,000 10,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common shares, par value (in dollars per share) $ 0.002 $ 0.002
Common shares, authorized (in shares) 100,000,000 100,000,000
Common stock, shares issued (in shares) 37,426,000 37,127,000
Common stock, shares outstanding (in shares) 29,582,000 30,009,000
Treasury shares (in shares) 7,844,000 7,118,000
v3.25.4
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Income Statement [Abstract]        
Revenue $ 162,263 $ 173,156 $ 344,764 $ 355,043
Cost of goods sold 1 127,439 133,145 267,095 270,506
Gross profit 34,824 40,011 77,669 84,537
Operating expenses        
Research and development 25,205 23,968 49,350 46,446
Selling, general and administrative 23,184 21,951 46,468 44,251
Total operating expenses 48,389 45,919 95,818 90,697
Operating loss (13,565) (5,908) (18,149) (6,160)
Other income, net 1 894 663 3,362 13
Interest income 1,124 1,135 2,016 2,400
Interest expenses (154) (701) (514) (1,513)
Net loss before income taxes and equity method investment income (loss) (11,701) (4,811) (13,285) (5,260)
Income tax expense 1,490 1,242 3,417 2,282
Net loss before equity method investment income (loss) (13,191) (6,053) (16,702) (7,542)
Equity method investment income (loss) (102) (561) 1,287 (1,568)
Net loss $ (13,293) $ (6,614) $ (15,415) $ (9,110)
Net loss per common share        
Basic (in dollars per share) $ (0.45) $ (0.23) $ (0.52) $ (0.31)
Diluted (in dollars per share) $ (0.45) $ (0.23) $ (0.52) $ (0.31)
Weighted average number of common shares used to compute net loss per share        
Basic (in shares) 29,816 29,163 29,926 29,083
Diluted (in shares) 29,816 29,163 29,926 29,083
v3.25.4
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Statement of Comprehensive Income [Abstract]        
Net loss $ (13,293) $ (6,614) $ (15,415) $ (9,110)
Other comprehensive income (loss), net of tax        
Foreign currency translation adjustments, net of $(75) and $(628) tax in each of the three months ended December 31, 2025 and 2024, respectively, and $(551) and $(525) in each of the six months ended December 31, 2025 and 2024, respectively 450 2,856 (339) 2,697
Cumulative translation adjustment release from sale of equity interest in the JV Company, net of tax $(1,209) 0 0 7,992 0
Comprehensive loss $ (12,843) $ (3,758) $ (7,762) $ (6,413)
v3.25.4
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parentheticals) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Statement of Comprehensive Income [Abstract]        
Foreign currency gain (loss), tax $ (75) $ (628) $ (551) $ (525)
Change of equity interest, tax $ 0   $ 1,209  
v3.25.4
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Shares
Treasury Shares
Additional Paid-In Capital
Accumulated Other Comprehensive Income ( Loss)
Retained Earnings
Beginning balance at Jun. 30, 2024 $ 891,607 $ 72 $ (79,213) $ 353,109 $ (13,419) $ 631,058
Beginning balance ( in shares) at Jun. 30, 2024   36,107,000        
Beginning balance (in shares) at Jun. 30, 2024     7,138,000      
Increase (Decrease) in Stockholders' Equity            
Exercise of common stock options and release of restricted stock units $ 91     91    
Exercise of common stock options and release of restricted stock units (in shares) 109,000          
Reissuance of treasury stock upon exercise of common stock options and release of RSUs (in shares)     3,000      
Stock Issued During Period, Value, Treasury Stock Reissued $ 0   $ 21     (21)
Withholding tax on restricted stock units (978)     (978)    
Withholding tax on restricted stock units (in shares)   (26,000)        
Issuance of shares under ESPP (in shares)   177,000        
Stock Issued During Period, Value, Employee Stock Purchase Plan 3,421 $ 1   3,420    
Share-based compensation 14,852     14,852    
Net loss (9,110)         (9,110)
Foreign currency translation adjustment, net of tax 2,697       2,697  
The change of equity interest in the JV Company 0          
Ending balance at Dec. 31, 2024 902,580 $ 73 $ (79,192) 370,494 (10,722) 621,927
Ending balance ( in shares) at Dec. 31, 2024   36,367,000        
Ending balance (in shares) at Dec. 31, 2024     7,135,000      
Beginning balance at Sep. 30, 2024 895,272 $ 72 $ (79,213) 359,429 (13,578) 628,562
Beginning balance ( in shares) at Sep. 30, 2024   36,162,000        
Beginning balance (in shares) at Sep. 30, 2024     7,138,000      
Increase (Decrease) in Stockholders' Equity            
Exercise of common stock options and release of restricted stock units $ 0     0    
Exercise of common stock options and release of restricted stock units (in shares) 36,000          
Reissuance of treasury stock upon exercise of common stock options and release of RSUs (in shares)     3,000      
Stock Issued During Period, Value, Treasury Stock Reissued $ 0   $ 21     (21)
Withholding tax on restricted stock units (305)     (305)    
Withholding tax on restricted stock units (in shares)   (8,000)        
Issuance of shares under ESPP (in shares)   177,000        
Stock Issued During Period, Value, Employee Stock Purchase Plan 3,421 $ 1   3,420    
Share-based compensation 7,950     7,950    
Net loss (6,614)         (6,614)
Foreign currency translation adjustment, net of tax 2,856       2,856  
The change of equity interest in the JV Company 0          
Ending balance at Dec. 31, 2024 902,580 $ 73 $ (79,192) 370,494 (10,722) 621,927
Ending balance ( in shares) at Dec. 31, 2024   36,367,000        
Ending balance (in shares) at Dec. 31, 2024     7,135,000      
Beginning balance at Jun. 30, 2025 $ 822,332 $ 74 $ (79,058) 379,779 (12,390) 533,927
Beginning balance ( in shares) at Jun. 30, 2025 37,127,000 37,127,000        
Beginning balance (in shares) at Jun. 30, 2025 7,118,000   7,118,000      
Increase (Decrease) in Stockholders' Equity            
Release of Restricted Stock Units   97,000        
Reissuance of treasury stock upon exercise of common stock options and release of RSUs (in shares)     2,000      
Stock Issued During Period, Value, Treasury Stock Reissued $ 0   $ 16     (16)
Withholding tax on restricted stock units (701)     (701)    
Withholding tax on restricted stock units (in shares)   (27,000)        
Issuance of shares under ESPP (in shares)   229,000        
Stock Issued During Period, Value, Employee Stock Purchase Plan 3,590 $ 1   3,589    
Repurchase of common shares under shares repurchase program $ (14,096)   $ (14,096)      
Repurchase of common shares under shares repurchase program (in shares) (728,373)   (728,000)      
Share-based compensation $ 15,405     15,405    
Net loss (15,415)         (15,415)
Foreign currency translation adjustment, net of tax 7,653       7,653  
The change of equity interest in the JV Company 7,992          
Ending balance at Dec. 31, 2025 $ 818,768 $ 75 $ (93,138) 398,072 (4,737) 518,496
Ending balance ( in shares) at Dec. 31, 2025 37,426,000 37,426,000        
Ending balance (in shares) at Dec. 31, 2025 7,844,000   7,844,000      
Beginning balance at Sep. 30, 2025 $ 834,104 $ 74 $ (79,058) 386,470 (5,187) 531,805
Beginning balance ( in shares) at Sep. 30, 2025   37,171,000        
Beginning balance (in shares) at Sep. 30, 2025     7,118,000      
Increase (Decrease) in Stockholders' Equity            
Release of Restricted Stock Units   37,000        
Reissuance of treasury stock upon exercise of common stock options and release of RSUs (in shares)     2,000      
Stock Issued During Period, Value, Treasury Stock Reissued 0   $ 16     (16)
Withholding tax on restricted stock units (260)     (260)    
Withholding tax on restricted stock units (in shares)   (11,000)        
Issuance of shares under ESPP (in shares)   229,000        
Stock Issued During Period, Value, Employee Stock Purchase Plan 3,590 $ 1   3,589    
Repurchase of common shares under shares repurchase program $ (14,096)   $ (14,096)      
Repurchase of common shares under shares repurchase program (in shares) (728,373)   (728,000)      
Share-based compensation $ 8,273     8,273    
Net loss (13,293)         (13,293)
Foreign currency translation adjustment, net of tax 450       450  
The change of equity interest in the JV Company 0          
Ending balance at Dec. 31, 2025 $ 818,768 $ 75 $ (93,138) $ 398,072 $ (4,737) $ 518,496
Ending balance ( in shares) at Dec. 31, 2025 37,426,000 37,426,000        
Ending balance (in shares) at Dec. 31, 2025 7,844,000   7,844,000      
v3.25.4
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Cash flows from operating activities    
Net loss $ (15,415) $ (9,110)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 28,472 28,690
Equity method investment income (loss) (1,287) 1,568
Share-based compensation expense 15,405 14,852
Deferred income taxes, net (8,342) 346
Other 76 167
Changes in operating assets and liabilities    
Accounts receivable 5,755 (7,333)
Inventories (10,425) 12,017
Contract assets 0 (8,451)
Other current and long-term assets 2,141 2,500
Accounts payable (10,438) (1,896)
Net payable, equity investee 1,111 4,455
Income taxes payable 2,730 277
Deferred revenue 2,047 (2,591)
Accrued and other liabilities (9,768) (10,365)
Net cash provided by operating activities 2,062 25,126
Cash flows from investing activities    
Proceeds from sale of equity interest in the JV Company 103,239 0
Purchases of property and equipment (24,730) (14,420)
Purchase of intangible assets (462) 0
Proceeds from sale of property and equipment 1 0
Government grant related to equipment 0 320
Loan receivable from supplier (3,536) 0
Net cash provided by (used in) investing activities 74,512 (14,100)
Cash flows from financing activities    
Withholding tax on restricted stock units (701) (978)
Proceeds from exercise of stock options and ESPP 3,590 3,512
Payment for repurchases of common shares (13,952) 0
Repayments of borrowings (21,659) (5,807)
Principal payments on finance leases (494) (459)
Net cash used in financing activities (33,216) (3,732)
Effect of exchange rate changes on cash, cash equivalents and restricted cash (91) (36)
Net increase in cash, cash equivalents and restricted cash 43,267 7,258
Cash, cash equivalents and restricted cash at beginning of period 153,498 175,540
Cash, cash equivalents and restricted cash at end of period 196,765 182,798
Supplemental disclosures of non-cash investing and financing information:    
Property and equipment purchased but not yet paid 8,598 3,738
Reconciliation of cash, cash equivalents, and restricted cash:    
Cash and cash equivalents 196,340 182,592
Restricted cash 425 206
Total cash, cash equivalents, and restricted cash $ 196,765 $ 182,798
v3.25.4
The Company and Significant Accounting Policies
 6 Months Ended
Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
The Company and Significant Accounting Policies The Company and Significant Accounting Policies
The Company

Alpha and Omega Semiconductor Limited and its subsidiaries (the “Company”, “AOS”, “we” or “us”) design, develop and supply a broad range of power semiconductors. The Company's portfolio of products targets high-volume applications, including personal computers, graphic cards, game consoles, home appliances, power tools, smart phones, battery packs, consumer and industrial motor controls and power supplies for computers, servers and telecommunications equipment. The Company conducts its operations primarily in the United States, Hong Kong, China, and South Korea.
Basis of Preparation

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions to Article 10 of Securities and Exchange Commission Regulation S-X, as amended. They do not include all information and footnotes necessary for a fair presentation of financial position, results of operations and cash flows in conformity with U.S. GAAP for complete financial statements. These Condensed Consolidated Financial Statements should be read in conjunction with the consolidated financial statements and related notes contained in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2025. For a complete discussion of the Company's accounting policies, refer to Part II, Item 8, Note 1 — Significant Accounting Policies in our 2025 Form 10-K. All significant intercompany balances and transactions have been eliminated in consolidation. In the opinion of management, all adjustments (consisting of normal recurring adjustments and accruals) considered necessary for a fair presentation of the results of operations for the periods presented have been included in the interim periods. Operating results for the six months ended December 31, 2025 are not necessarily indicative of the results that may be expected for the fiscal year ending June 30, 2026 or any other interim period. The consolidated balance sheet at June 30, 2025 is derived from the audited financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2025.

Use of Estimates

The preparation of the consolidated financial statements in conformity with U.S. GAAP requires the Company to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses. To the extent there are material differences between these estimates and actual results, the Company's consolidated financial statements will be affected. On an ongoing basis, the Company evaluates the estimates, judgments and assumptions including those related to reserve of stock rotation returns, allowance for price adjustments, allowance for expected credit loss, inventory reserves, warranty accrual, income taxes, leases, share-based compensation, and recoverability of and useful lives for property, plant and equipment.

Recent Accounting Pronouncements

Recently Issued Accounting Standards not yet adopted

In December 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2023-09, “Income Taxes (Topic 740) – Improvements to Income Tax Disclosures”, which enhances the transparency, effectiveness and comparability of income tax disclosures by requiring consistent categories and greater disaggregation of information related to income tax rate reconciliations and the jurisdictions in which income taxes are paid. This will impact only the Company's disclosures for the annual reporting period ending June 30, 2026, with no impacts to its financial condition or results of operations.

In November 2024, the FASB issued ASU No. 2024-03, “Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures”, which improves disclosure requirements and provides more detailed information about an entity’s expenses, specifically amounts related to purchases of inventory, employee compensation, depreciation, intangible asset amortization, and selling expenses, along with qualitative descriptions of certain other types of expenses. This guidance is effective for fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact of the ASU on its consolidated financial statements.
In July 2025, the FASB issued ASU No. 2025-05, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets”, which provides an optional practical expedient for estimating future credit losses based on current conditions as of the balance sheet date and assuming those conditions do not change over the remaining life of the accounts receivable. The guidance will be effective for annual reporting periods beginning after December 15, 2025, and interim reporting periods within those annual reporting periods, with early adoption permitted. The Company does not expect this ASU to have a material impact on its consolidated financial statements.

In September 2025, the FASB issued ASU No. 2025-06, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software”. The ASU removes references to prescriptive software development stages and includes an updated framework for capitalizing internal software costs. The guidance will be effective for annual reporting periods beginning after December 15, 2027, and interim reporting periods within those annual reporting periods, with early adoption permitted. The Company is currently evaluating the impact of the ASU on its consolidated financial statements.

In December 2025, the FASB issued ASU No. 2025-10, “Accounting for Government Grants Received by Business Entities”. This amendment provides guidance on the recognition, measurement, and presentation of government grants. This amendment will be effective for annual reporting periods beginning after December 15, 2028, and interim reporting periods within those annual reporting periods, with early adoption permitted. The Company is currently evaluating the impact of the ASU on its consolidated financial statements.
v3.25.4
Equity Method Investment in Equity Investee
 6 Months Ended
Dec. 31, 2025
Equity Method Investments and Joint Ventures [Abstract]  
Equity Method Investment in Equity Investee Equity Method Investment in Equity Investee
The Company has accounted for its investment in the JV Company using the equity method of accounting. For details of its equity method investment, please refer to Part II, Item 8, Note 2 — Equity Method Investment in Equity Investee in its 2025 Form 10-K.

On July 14, 2025, the Company entered into an equity transfer agreement to sell approximately 20.3% of outstanding equity interest in the JV Company for an aggregate cash consideration of $150 million. On August 29, 2025, the amended shareholders’ agreement for the JV Company was signed, which reduced the Company’s equity interest in the JV Company by 20.3% to an ownership percentage of 18.9%. As a result, the Company received its first installment of RMB 676 million (or $94.5 million based on the currency exchange rate between RMB and U.S. Dollar on August 29, 2025), and paid transaction costs related to this sale of approximately $2.4 million. In addition, the Company received $11.1 million for the second installment payment during the three months ended December 31, 2025, and maintained a receivable balance of $46.1 million as of December 31, 2025, which is included in the receivable from sale of equity interest in the JV Company line on the Condensed Consolidated Balance Sheets. In January 2026, the Company also received $30.3 million for the third installment. The remaining installment will be received subject to satisfaction of certain conditions, which require the Company's continuing involvement, including voting in shareholder meetings to complete the transaction in accordance with the equity transfer agreement, plus other administrative actions. As a result of the sales transaction, the Company evaluated the factors that indicate the ability to exercise its significant influence to the JV Company, including but not limited to representation on the board, material intra-entity transactions, and participation in policy making process. The Company concluded that it continues to have the ability to exercise significant influence over the operating and financial policies of the JV Company and accordingly accounts for the investment using the equity method of accounting.

The Company reports its equity in earnings or loss of the JV Company on a three-month lag due to an inability to timely obtain financial information from the JV Company. During the three months ended December 31, 2025, the Company recorded a $0.1 million loss, using lag reporting. During the six months ended December 31, 2025, the Company recorded $1.3 million gain, including the $1.1 million gain on the related sale of a portion of its interest in the equity method investment and $0.2 million gain of its equity share of the JV Company, using lag reporting. During the three and six months ended December 31, 2024, the Company recorded a $0.6 million loss and a $1.6 million loss on its equity share of the JV Company, respectively, using lag reporting.
v3.25.4
Related Party Transactions
 6 Months Ended
Dec. 31, 2025
Related Party Transactions [Abstract]  
Related Party Transactions Related Party Transactions
As of December 31, 2025, the Company owned approximately 18.9% equity interest in the JV Company, which, by definition, is a related party to the Company. The JV Company supplies 12-inch wafers and provides assembly and testing services to AOS. The JV Company reimbursed AOS for purchases made on its behalf of $1.0 million and $1.1 million for the three and six months ended December 31, 2025, respectively and $3.1 million and $5.3 million for the three and six months ended December 31, 2024, respectively. The purchases by AOS for the three and six months ended December 31, 2025 were $25.1 million and $55.4 million, respectively, and for the three and six months ended December 31, 2024 were $28.2 million and $56.5 million, respectively. Due to the right of offset of receivables and payables with the JV Company, as of December 31, 2025 and June 30, 2025, AOS recorded the net amount of $16.9 million and $15.8 million, respectively, as a payable related to equity investee, net, on the Condensed Consolidated Balance Sheet. During the three and six months ended December 31, 2025, the Company also recorded nil and approximately $1.9 million, respectively, of other income for certain service the Company provided to the JV Company.
v3.25.4
Net Income (Loss) Per Common Share Attributable to Alpha and Omega Semiconductor Limited
 6 Months Ended
Dec. 31, 2025
Earnings Per Share [Abstract]  
Net Income (Loss) Per Common Share Attributable to Alpha and Omega Semiconductor Limited Net Loss Per Common Share
The following table presents the calculation of basic and diluted net loss per share attributable to common shareholders:
 Three Months Ended December 31,Six Months Ended December 31,
 2025202420252024
(in thousands, except per share data)
Numerator:
Net loss$(13,293)$(6,614)$(15,415)$(9,110)
Denominator:
Basic:
Weighted average number of common shares used to compute basic net loss per share29,816 29,163 29,926 29,083 
Diluted:
Weighted average number of common shares used to compute diluted net loss per share29,816 29,163 29,926 29,083 
Net loss per common share:
Basic$(0.45)$(0.23)$(0.52)$(0.31)
Diluted$(0.45)$(0.23)$(0.52)$(0.31)
The following potential dilutive securities were excluded from the computation of diluted net loss per common share as their effect would have been anti-dilutive:
 Three Months Ended December 31,Six Months Ended December 31,
 2025202420252024
(in thousands)(in thousands)
Employee stock options and RSUs2,459 2,573 2,440 2,578 
ESPP1,500 729 914 716 
Total potential dilutive securities3,959 3,302 3,354 3,294 
v3.25.4
Concentration of Credit Risk and Significant Customers
 6 Months Ended
Dec. 31, 2025
Risks and Uncertainties [Abstract]  
Concentration of Credit Risk and Significant Customers Concentration of Credit Risk and Significant Customers
The Company manages its credit risk associated with exposure to distributors and direct customers on outstanding accounts receivable through the application and review of credit approvals, credit ratings and other monitoring procedures. In some instances, the Company also obtains letters of credit from certain customers.

Credit sales, which are mainly on credit terms of 30 to 60 days, are only made to customers who meet the Company’s credit requirements, while sales to new customers or customers with low credit ratings are usually made on an advance payment basis. The Company considers its trade accounts receivable to be of good credit quality because its key distributors and direct customers have long-standing business relationships with the Company and the Company has not experienced any significant bad debt write-offs of accounts receivable in the past. The Company closely monitors the aging of accounts receivable from its distributors and direct customers, and regularly reviews their financial positions, where available.
Summarized below are individual customers whose revenue or accounts receivable balances were 10% or higher than the respective total consolidated amounts:
Three Months Ended December 31,Six Months Ended December 31,
Percentage of revenue2025202420252024
Customer A20.9 %21.0 %21.4 %21.8 %
Customer B51.5 %52.7 %52.7 %52.1 %

 December 31,
2025		June 30,
2025
Percentage of accounts receivable
Customer A *14.9 %
Customer B 49.6 %52.3 %
v3.25.4
Balance Sheet Components
 6 Months Ended
Dec. 31, 2025
Balance Sheet Related Disclosures [Abstract]  
Balance Sheet Components Balance Sheet Components
Accounts receivable, net:
 December 31,
2025		June 30,
2025
(in thousands)
Accounts receivable$70,676 $75,604 
Less: Allowance for price adjustments(41,629)(40,802)
Less: Allowance for credit losses(30)(30)
Accounts receivable, net$29,017 $34,772 

Inventories:
 December 31,
2025		June 30,
2025
(in thousands)
Raw materials$78,905 $81,341 
Work-in-process95,175 91,591 
Finished goods26,022 16,745 
 $200,102 $189,677 

Other current assets:
December 31,
2025		June 30,
2025
(in thousands)
Value-added tax receivable$577 $339 
Other prepaid expenses1,933 2,383 
Prepaid insurance2,536 3,669 
Prepaid maintenance1,405 1,990 
Deposit with supplier661 7,073 
Prepaid income tax585 336 
Interest receivable210 191 
Short term deposit709 534 
Other receivables1,756 1,700 
$10,372 $18,215 
Property, plant and equipment, net:
 December 31,
2025		June 30,
2025
(in thousands)
Land$4,877 $4,877 
Building and building improvements72,035 71,961 
Manufacturing machinery and equipment462,223 442,462 
Equipment and tooling39,184 37,918 
Computer equipment and software53,634 53,509 
Office furniture and equipment3,241 3,267 
Leasehold improvements43,727 43,901 
 678,921 657,895 
Less: accumulated depreciation and amortization(396,376)(371,836)
 282,545 286,059 
Equipment and construction in progress28,416 28,038 
Property, plant and equipment, net$310,961 $314,097 

Intangible assets, net:
December 31,
2025		June 30,
2025
(in thousands)
Patents and technology rights$18,037 $18,037 
Software license1,181 — 
Trade name268 268 
Customer relationships1,150 1,150 
20,636 19,455 
Less: accumulated amortization(19,617)(19,455)
1,019 — 
Goodwill269 269 
Intangible assets, net$1,288 $269 

Future amortization expense of intangible assets is as follows (in thousands):
Year ending June 30,
2026 (Remaining)$203 
2027406 
2028406 
20294
$1,019 
Other long-term assets:
December 31,
2025		June 30,
2025
(in thousands)
Prepayments for property and equipment$5,348 $1,973 
Customs deposit618 814 
Deposit with supplier23,342 18,080 
Office leases deposits1,082 1,358 
Other4,008 541 
 $34,398 $22,766 
Accrued liabilities:
December 31,
2025		June 30,
2025
(in thousands)
Accrued compensation and benefits$23,913 $17,766 
Warranty accrual2,018 2,118 
Stock rotation accrual5,873 6,184 
Accrued professional fees2,674 3,399 
Accrued inventory1,098 1,465 
Accrued facilities related expenses2,510 2,184 
Accrued property, plant and equipment4,107 2,704 
Other accrued expenses4,623 4,755 
Customer deposits9,533 17,030 
ESPP payable1,476 1,422 
 $57,825 $59,027 
Short-term customer deposits are payments received from customers for securing future product shipments. As of December 31, 2025, $5.0 million for such deposits were from Customer A, $1.0 million were from Customer B, and $3.5 million were from other customers. As of June 30, 2025, $7.0 million were from Customer A, $2.0 million were from Customer B, and $8.0 million were from other customers.
The activities in the warranty accrual, included in accrued liabilities, are as follows:
Six Months Ended December 31,
20252024
(in thousands)
Beginning balance$2,118 $2,407 
Additions 833 656 
Released— (700)
Utilization(933)(403)
Ending balance$2,018 $1,960 
The activities in the stock rotation accrual, included in accrued liabilities, are as follows:
Six Months Ended December 31,
20252024
(in thousands)
Beginning balance$6,184 $4,660 
Additions7,972 4,709 
Utilization(8,283)(5,231)
Ending balance$5,873 $4,138 
Other long-term liabilities:
 December 31,
2025		June 30,
2025
(in thousands)
Customer deposits$4,689 $7,000 
Other505 — 
Other long-term liabilities$5,194 $7,000 

Customer deposits are payments received from customers for securing future product shipments. As of December 31, 2025, there were no customer deposits from Customer A and $4.7 million were from other customers. As of June 30, 2025, $5.0 million were from Customer A and $2.0 million were from other customers.
v3.25.4
Bank Borrowing
 6 Months Ended
Dec. 31, 2025
Debt Disclosure [Abstract]  
Bank Borrowing Bank Borrowings
Accounts Receivable Factoring Agreement

On August 9, 2019, one of the Company's wholly-owned subsidiaries (the "Borrower") entered into a factoring agreement with the Hongkong and Shanghai Banking Corporation Limited (“HSBC”), whereby the Borrower assigns certain of its accounts receivable with recourse. This factoring agreement allows the Borrower to borrow up to 70% of the net amount of its eligible accounts receivable of the Borrower with a maximum amount of $30.0 million. The interest rate is based on the Secured Overnight Financing Rate ("SOFR"), plus 2.01% per annum. The Company is the guarantor for this agreement. The Company is accounting for this transaction as a secured borrowing under the Transfers and Servicing of Financial Assets guidance. In addition, any cash held in the restricted bank account controlled by HSBC has a legal right of offset against the borrowing. This agreement, with certain financial covenants required, has no expiration date. On August 11, 2021, the Borrower signed an agreement with HSBC to decrease the borrowing maximum amount to $8.0 million with certain financial covenants required. Other terms remain the same. In August 2025, this factoring agreement was terminated. As of December 31, 2025, there was no outstanding balance.

Debt financing

In September 2021, Jireh Semiconductor Incorporated (“Jireh”), one of the wholly-owned subsidiaries, entered into a financing arrangement agreement with a company (“Lender”) for the lease and purchase of a machinery equipment manufactured by a supplier. This agreement includes a payment term of five (5) years, pursuant to which Jireh commenced payments of interests and principal to the Lender in September 2022 when the final installation and acceptance of the equipment were completed. After the end of such payment term, Jireh has the option to purchase the equipment for $1. The implied interest rate was 4.75% per annum which was adjustable based on every five basis point increase in 60-month U.S. Treasury Notes. The total purchase price of this equipment was euro 12.0 million. In April 2021, Jireh made a down payment of euro 6.0 million, representing 50% of the total purchase price of the equipment, to the supplier. In June 2022, the equipment was delivered to Jireh after Lender paid 40% of the total purchase price, for euro 4.8 million, to the supplier on behalf of Jireh. In September 2022, Lender paid the remaining 10% payment for the total purchase price and reimbursed Jireh for the 50% down payment, after the installation and configuration of the equipment. The title of the equipment was transferred to Lender following such payment. The agreement was amended with fixed implied interest rate of 7.51% and monthly payment of principal and interest effective in October 2022. Other terms remain the same. In addition, Jireh purchased hardware for the machine under this financing arrangement. The purchase price of this hardware was $0.2 million. The financing arrangement is secured by this equipment and other equipment at Jireh, which had a net book value of $11.3 million as of December 31, 2025. As of December 31, 2025, the outstanding balance of this debt financing was $5.1 million.

Long-term bank borrowings

On August 18, 2021, Jireh entered into a term loan agreement with a financial institution (the “Bank”) in an amount up to $45.0 million for the purpose of expanding and upgrading the Company’s fabrication facility located in Oregon. The obligation under the loan agreement is secured by substantially all assets of Jireh and guaranteed by the Company. The agreement has a 5.5 year term and matures on February 16, 2027. Jireh is required to make consecutive quarterly payments of principal and interest. The loan accrues interest based on adjusted SOFR plus the applicable margin based on the outstanding balance of the loan. This agreement contains customary restrictive covenants and includes certain financial covenants that the Company is required to maintain. Jireh drew down $45.0 million on February 16, 2022 with the first payment of principal beginning in October 2022. As of June 30, 2025, Jireh was in compliance with these covenants and the outstanding balance of this loan was $20.3 million. In August 2025, the Company paid the outstanding balance in full and this agreement was terminated. As of December 31, 2025, there was no outstanding balance.
Maturities of short-term debt and long-term debt were as follows (in thousands):
Year ending June 30,
2026 (Remaining)
$1,462 
2027
3,095 
2028
536 
Total principal$5,093 
Short-term DebtLong-term DebtTotal
Principal amount$2,980 $2,113 $5,093 
v3.25.4
Leases
 6 Months Ended
Dec. 31, 2025
Leases [Abstract]  
Leases Leases
The Company evaluates contracts for lease accounting at contract inception and assesses lease classification at the lease commencement date. The finance lease is related to the $5.1 million of a machinery lease financing with a vendor. The Company does not record leases on the Condensed Consolidated Balance Sheets with a term of one year or less.
The components of the Company’s operating and finance lease expenses are as follows for the periods presented (in thousands):

Three Months Ended December 31,Six Months Ended December 31,
2025202420252024
Operating leases:
     Fixed rent expense$1,649 $1,408 $3,278 $3,145 
     Variable rent expense269 270 539 539 
Finance lease:
     Amortization of equipment129 129 257 257 
     Interest37 55 78 114 
Short-term leases
     Short-term lease expenses33 42 79 74 
               Total lease expenses$2,117 $1,904 $4,231 $4,129 
Supplemental balance sheet information related to the Company’s operating and finance leases is as follows (in thousands, except lease term and discount rate):
December 31, 2025June 30, 2025
Operating Leases:
     Right-of-use assets associated with operating leases
$23,661 $21,288 
Finance Lease:
     Property, plant and equipment, gross$5,133 $5,133 
     Accumulated depreciation(1,941)(1,684)
          Property, plant and equipment, net$3,192 $3,449 
Weighted average remaining lease term (in years)
     Operating leases4.425.00
     Finance lease1.752.25
Weighted average discount rate
     Operating leases4.92 %4.88 %
     Finance lease7.51 %7.51 %

Supplemental cash flow information related to the Company’s operating and finance leases is as follows (in thousands):
Six Months Ended December 31,
20252024
Cash paid for amounts included in the measurement of lease liabilities:
     Operating cash flows from operating leases$3,375 $3,201 
     Operating cash flows from finance lease$78 $114 
     Financing cash flows from finance lease$494 $459 
Non-cash investing and financing information:
    Operating lease right-of-use assets obtained in exchange for lease obligations$5,330 $892 

Future minimum lease payments are as follows as of December 31, 2025 (in thousands):

Year ending June 30,Operating LeasesFinance Leases
The remainder of fiscal 2026
$3,498 $572 
2027
6,935 1,144 
2028
6,379 191 
2029
4,691 — 
2030
3,635 — 
Thereafter2,016 — 
Total minimum lease payments27,154 1,907 
Less amount representing interest(2,777)(119)
Total lease liabilities$24,377 $1,788 
Leases Leases
The Company evaluates contracts for lease accounting at contract inception and assesses lease classification at the lease commencement date. The finance lease is related to the $5.1 million of a machinery lease financing with a vendor. The Company does not record leases on the Condensed Consolidated Balance Sheets with a term of one year or less.
The components of the Company’s operating and finance lease expenses are as follows for the periods presented (in thousands):

Three Months Ended December 31,Six Months Ended December 31,
2025202420252024
Operating leases:
     Fixed rent expense$1,649 $1,408 $3,278 $3,145 
     Variable rent expense269 270 539 539 
Finance lease:
     Amortization of equipment129 129 257 257 
     Interest37 55 78 114 
Short-term leases
     Short-term lease expenses33 42 79 74 
               Total lease expenses$2,117 $1,904 $4,231 $4,129 
Supplemental balance sheet information related to the Company’s operating and finance leases is as follows (in thousands, except lease term and discount rate):
December 31, 2025June 30, 2025
Operating Leases:
     Right-of-use assets associated with operating leases
$23,661 $21,288 
Finance Lease:
     Property, plant and equipment, gross$5,133 $5,133 
     Accumulated depreciation(1,941)(1,684)
          Property, plant and equipment, net$3,192 $3,449 
Weighted average remaining lease term (in years)
     Operating leases4.425.00
     Finance lease1.752.25
Weighted average discount rate
     Operating leases4.92 %4.88 %
     Finance lease7.51 %7.51 %

Supplemental cash flow information related to the Company’s operating and finance leases is as follows (in thousands):
Six Months Ended December 31,
20252024
Cash paid for amounts included in the measurement of lease liabilities:
     Operating cash flows from operating leases$3,375 $3,201 
     Operating cash flows from finance lease$78 $114 
     Financing cash flows from finance lease$494 $459 
Non-cash investing and financing information:
    Operating lease right-of-use assets obtained in exchange for lease obligations$5,330 $892 

Future minimum lease payments are as follows as of December 31, 2025 (in thousands):

Year ending June 30,Operating LeasesFinance Leases
The remainder of fiscal 2026
$3,498 $572 
2027
6,935 1,144 
2028
6,379 191 
2029
4,691 — 
2030
3,635 — 
Thereafter2,016 — 
Total minimum lease payments27,154 1,907 
Less amount representing interest(2,777)(119)
Total lease liabilities$24,377 $1,788 
v3.25.4
Shareholders' Equity and Share-based Compensation
 6 Months Ended
Dec. 31, 2024
Share-Based Payment Arrangement, Noncash Expense [Abstract]  
Shareholders' Equity and Share-based Compensation Shareholders’ Equity and Share-based Compensation
Share Repurchase

In November 2025, the Board of Directors approved a new share repurchase program (the “Repurchase Program”) that authorizes the Company to repurchase its common shares from the open market pursuant to a pre-established Rule 10b5-1 trading plan or through privately negotiated transactions up to an aggregate of $30.0 million. The amount and timing of any repurchases under the
Repurchase Program depend on a number of factors, including but not limited to, the trading price, volume and availability of the
Company’s common shares. Shares repurchased under this program are accounted for as treasury shares and the total cost of shares
repurchased is recorded as a reduction of shareholders' equity. From time to time, treasury shares may be reissued as part of the
Company’s share-based compensation programs. Gains on the reissuance of treasury stock are credited to additional paid-in capital;
losses are charged to additional paid-in capital to offset the net gains, if any, from previous sales or reissuance of treasury stock. Any
remaining balance of the losses is charged to retained earnings.

During the three and six months ended December 31, 2025, the Company repurchased an aggregate of 728,373 shares from the open market, for a total cost of $13.9 million, excluding fees and related expenses, at an average price of $19.12 per share. As of December 31, 2025, approximately $16.1 million remained available under the Repurchase Program.

Time-based Restricted Stock Units (“TRSUs”)

The following table summarizes the Company’s TRSU activities for the six months ended December 31, 2025:
 
Number of Time-based Restricted Stock
Units
Weighted Average
Grant Date Fair
Value Per Share		Weighted Average
Remaining
Contractual
Term (Years)		Aggregate Intrinsic Value
Nonvested at June 30, 20251,491,926 $28.50 1.66$38,282,821 
Granted200,151 $24.86 
Vested(99,671)$33.61 
Forfeited(62,540)$28.97 
Nonvested at December 31, 20251,529,866 $27.67 1.32$30,306,645 

Market-based Restricted Stock Units (“MSUs”)

During the quarter ended of December 31, 2021 and September 30, 2018, the Company granted 1.0 million and 1.3 million of market-based restricted stock units (“MSUs”) to certain personnel, respectively. For additional information, refer to “Note 10 — Share-based Compensation” in the Notes to the Consolidated Financial Statements within Item 8 of the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2025. The Company recorded $1.2 million and $2.7 million of such expenses for the three and six months ended December 31, 2025, respectively, and $1.6 million and $2.6 million of expenses during the three and six months ended December 31, 2024, respectively.

The following table summarizes the Company’s MSUs activities for the six months ended December 31, 2025:

 
Number of Market-based Restricted Stock
Units
Weighted Average
Grant Date Fair
Value Per Share		Weighted Average
Remaining
Contractual Term
(Years)		Aggregate Intrinsic Value
Nonvested at June 30, 20251,436,000 $32.32 2.89$36,847,760 
Vested(267,500)$5.17 
Forfeited(51,000)$48.44 
Nonvested at December 31, 20251,117,500 $38.08 2.90$22,137,675 
Performance-based Restricted Stock Units (“PRSUs”)

In March of each year since year 2017, the Company granted PRSUs to certain personnel. The number of shares to be earned under the PRSUs is determined based on the level of attainment of predetermined financial goals. The PRSUs vest in four equal annual installments from the first anniversary date after the grant date if certain predetermined financial goals were met. The Company recorded approximately $1.1 million and $2.3 million of expenses, using the accelerated attribution method, for these PRSUs during the three and six months ended December 31, 2025, respectively, and $1.0 million and $1.9 million for the three and six months ended December 31, 2024, respectively.

The following table summarizes the Company’s PRSUs activities for the six months ended December 31, 2025:

 Number of Performance-based Restricted Stock
Units		Weighted Average
Grant Date Fair
Value Per Share		Weighted Average
Remaining
Contractual Term
(Years)		Aggregate Intrinsic Value
Nonvested at June 30, 2025409,563 $27.71 1.85$10,509,387 
Forfeited(1,500)$28.33 
Nonvested at December 31, 2025408,063 $27.70 1.34$8,083,728 
Employee Share Purchase Plan (“ESPP”)
The assumptions used to estimate the fair values of common shares issued under the ESPP were as follows:
Six Months Ended December 31,
2025
Volatility rate76.0%
Risk-free interest rate3.7%
Expected term1.3 years
Dividend yield—%
Share-based Compensation Expense
The total share-based compensation expense recognized in the Condensed Consolidated Statements of Loss for the periods presented was as follows:
Three Months Ended December 31,Six Months Ended December 31,
2025202420252024
(in thousands)(in thousands)
Cost of goods sold$1,232 $1,123 $2,297 $2,138 
Research and development2,288 2,193 4,147 4,128 
Selling, general and administrative4,753 4,634 8,961 8,586 
$8,273 $7,950 $15,405 $14,852 

As of December 31, 2025, total unrecognized compensation cost under the Company’s share-based compensation plans was $48.0 million, which is expected to be recognized over a weighted-average period of 2.0 years.
v3.25.4
Income Taxes
 6 Months Ended
Dec. 31, 2025
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The Company recognized income tax expense of approximately $1.5 million and $1.2 million for the three months ended December 31, 2025 and 2024, respectively. The income tax expense of $1.5 million for the three months ended December 31, 2025 included a $0.1 million discrete tax expense. The income tax expense of $1.2 million for the three months ended December 31, 2024 included a $0.1 million discrete tax expense. Excluding the discrete income tax items, the income tax expense for the three months ended December 31, 2025 and 2024 was $1.4 million and $1.2 million, respectively, and the effective tax rate for the three months ended December 31, 2025 and 2024 was (12.0)% and (22.1)%, respectively. The changes in the tax expense and effective tax rate between the periods resulted primarily from changes in the mix of earnings in various geographic jurisdictions between the current period and the same period of last year.

The Company recognized income tax expense of approximately $3.4 million and $2.3 million for the six months ended December 31, 2025 and 2024, respectively. The income tax expense of $3.4 million for the six months ended December 31, 2025
included a $0.1 million discrete tax expense. The income tax expense of $2.3 million for the six months ended December 31, 2024
included a $0.1 million discrete tax expense. Excluding the discrete income tax items, income tax expense for the six months ended December 31, 2025 and 2024 was $3.3 million and $2.1 million, respectively, and the effective tax rate for the six months ended December 31, 2025 and 2024 was (27.3)% and (31.4)%, respectively. The changes in the tax expense and effective tax rate between the periods resulted primarily from changes in the mix of earnings in various geographic jurisdictions between the current year and the same period of last year, including reporting $0.7 million of income tax expense related to the Company’s income from its investment in CQJV for the six months ended December 31, 2025 versus an $0.2 million tax benefit for the six months ended December 31, 2024.

During the three months ended September 30, 2025, income tax payable increased by $10.4 million and deferred tax liability decreased by $10.5 million as a result of the sale of approximately 20.3% of the Company’s equity interest in the JV company for $150 million. The Company made income tax payments of approximately $8.7 million as a result of the sale transaction during the three months ended December 31, 2025.

The Company files its income tax returns in the United States and in various foreign jurisdictions. The tax years 2004 to 2025 remain open to examination by U.S. federal and state tax authorities. The tax years 2019 to 2025 remain open to examination by foreign tax authorities.

The Company’s income tax returns are subject to examinations by the Internal Revenue Service and other tax authorities in various jurisdictions. In accordance with the guidance on the accounting for uncertainty in income taxes, the Company regularly assesses the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of its provision for income taxes. These assessments can require considerable estimates and judgments. As of December 31, 2025, the gross amount of unrecognized tax benefits was approximately $10.8 million, of which $7.5 million, if recognized, would reduce the effective income tax rate in future periods. If the Company’s estimate of income tax liabilities proves to be less than the ultimate assessment, then a further charge to expense would be required. If events occur and the payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when the Company determines the liabilities are no longer necessary.

One Big Beautiful Bill Act, Enacted July 4, 2025

On July 4, 2025, H.R. 1, commonly known as the One Big Beautiful Bill Act (the “OBBB”), was signed into law. This includes significant changes to the federal corporate tax provisions and extends certain otherwise expiring provisions of the 2017 Tax Cuts and Jobs Act. The key provisions include allowing immediate expensing of domestic research and experimental expenditures, new limitations on interest expense deductibility, reinstatement of 100% bonus depreciation for qualified assets placed in service in the United States after January 19, 2025 as well as changes to the calculation of taxable income resulting from the foreign derived intangible income deduction. ASC 740 Income Taxes requires the effects of changes in tax rates and laws to be recognized in the period in which the relevant legislation is enacted. The Company has concluded that the impact of OBBB for the current quarter is immaterial.
v3.25.4
Segment and Geographic Information
 6 Months Ended
Dec. 31, 2025
Segment Reporting [Abstract]  
Segment and Geographic Information Segment and Geographic Information
The Company is organized as, and operates in, one operating segment: the design, development and supply of power semiconductor products for computing, consumer electronics, communication and industrial applications. The chief operating decision-maker is the Chief Executive Officer. The financial information presented to the Company’s Chief Executive Officer is on a consolidated basis, accompanied by information about revenue by customer and geographic region, for purposes of evaluating financial performance and allocating resources. The Chief Executive Officer assesses performance of the Company, monitors budget versus actual results and determines how to allocate resources based on the consolidated net income or loss as reported on the Company’s Condensed Consolidated Statements of Income (Loss). There are no other expense categories regularly provided to the Chief Executive Officer that are not already included in the Condensed Consolidated Statements of Income (Loss). The Company has one business segment, and there are no segment managers who are held accountable for operations, operating results and plans for products or components below the consolidated unit level. Accordingly, the Company reports as a single operating segment.

The Company sells its products primarily to distributors in the Asia Pacific region, who in turn sell these products to end customers. Because the Company’s distributors sell their products to end customers which may have a global presence, revenue by geographical location is not necessarily representative of the geographical distribution of sales to end user markets.

The revenue by geographical location in the following tables is based on the country or region in which the products were shipped to:
Three Months Ended December 31,Six Months Ended December 31,
 2025202420252024
(in thousands)(in thousands)
Hong Kong$155,767 $150,640 $334,178 $304,135 
China2,664 15,915 5,021 37,170 
South Korea469 409 948 699 
United States1,319 699 2,444 1,772 
Other countries2,044 5,493 2,173 11,267 
 $162,263 $173,156 $344,764 $355,043 

The following is a summary of revenue by product type:
Three Months Ended December 31,Six Months Ended December 31,
 2025202420252024
 (in thousands)(in thousands)
Power discrete$100,985 $112,956 $209,491 $235,410 
Power IC58,827 53,735 131,535 106,675 
Packaging and testing services and other2,451 1,064 3,738 1,916 
License and development services— 5,401 — 11,042 
 $162,263 $173,156 $344,764 $355,043 
Long-lived assets, net consisting of property, plant and equipment and operating lease right-of-use assets, net by geographical area are as follows:
 December 31,
2025		June 30,
2025
(in thousands)
China$103,267 $99,389 
United States225,494 230,518 
Other countries5,861 5,478 
 $334,622 $335,385 
v3.25.4
Commitments and Contingencies
 6 Months Ended
Dec. 31, 2025
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies Commitments and Contingencies
Purchase Commitments
As of December 31, 2025, the Company had approximately $61.0 million of outstanding purchase commitments primarily for purchases of semiconductor raw materials, wafers, spare parts, packaging and testing services and others, as well as $17.3 million of capital commitments for the purchase of property and equipment. Purchase commitments are generally restricted to a purchase forecast as mutually agreed between the parties. This purchase forecast can vary among different suppliers.
Other Commitments
        See Note 7 and Note 8 of the Notes to the Condensed Consolidated Financial Statements contained in this Quarterly Report on Form 10-Q for descriptions of commitments including bank borrowings and leases.
Contingencies and Indemnities
The Company has in the past, and may from time to time in the future, become involved in legal proceedings arising from the normal course of business activities.  The semiconductor industry is characterized by frequent claims and litigation, including claims regarding patent and other intellectual property rights as well as improper hiring practices. Irrespective of the validity of such claims, the Company could incur significant costs in the defense of such claims and suffer adverse effects on its operations.

The Company is a party to a variety of agreements contracted with various third parties. Pursuant to these agreements, the Company may be obligated to indemnify another party to such an agreement with respect to certain matters. Typically, these obligations arise in the context of contracts entered into by the Company, under which the Company customarily agrees to hold the other party harmless against losses arising from a breach of representations and covenants related to such matters as title to assets sold, certain intellectual property rights, specified environmental matters and certain income taxes. In these circumstances, payment by the Company is customarily conditioned on the other party making a claim pursuant to the procedures specified in the particular contract, which procedures typically allow the Company to challenge the other party’s claim. Further, the Company's obligations under these agreements may be limited in time and/or amount, and in some instances, the Company may have recourse against third parties for certain payments made by it under these agreements. The Company has not historically paid or recorded any material indemnifications, and no accrual was made at December 31, 2025 and June 30, 2025.
The Company has agreed to indemnify its directors and certain employees as permitted by law and pursuant to its By-laws, and has entered into indemnification agreements with its directors and executive officers. The Company has not recorded a liability associated with these indemnification arrangements, as it historically has not incurred any material costs associated with such indemnification obligations. Costs associated with such indemnification obligations may be mitigated by insurance coverage that the Company maintains. However, such insurance may not cover any, or may cover only a portion of, the amounts the Company may be required to pay. In addition, the Company may not be able to maintain such insurance coverage at a reasonable cost, if at all, in the future.
v3.25.4
Pay vs Performance Disclosure - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Pay vs Performance Disclosure        
Net loss $ (13,293) $ (6,614) $ (15,415) $ (9,110)
v3.25.4
Insider Trading Arrangements
 3 Months Ended
Dec. 31, 2025
Trading Arrangements, by Individual  
Material Terms of Trading Arrangement
Bing Xue [Member]  
Trading Arrangements, by Individual  
Arrangement Duration 343 days
Yifan Liang [Member]  
Trading Arrangements, by Individual  
Arrangement Duration 274 days
Stephen C. Chang [Member]  
Trading Arrangements, by Individual  
Arrangement Duration 295 days
v3.25.4
The Company and Significant Accounting Policies (Policies)
 6 Months Ended
Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Basis of Preparation
Basis of Preparation

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions to Article 10 of Securities and Exchange Commission Regulation S-X, as amended. They do not include all information and footnotes necessary for a fair presentation of financial position, results of operations and cash flows in conformity with U.S. GAAP for complete financial statements. These Condensed Consolidated Financial Statements should be read in conjunction with the consolidated financial statements and related notes contained in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2025. For a complete discussion of the Company's accounting policies, refer to Part II, Item 8, Note 1 — Significant Accounting Policies in our 2025 Form 10-K. All significant intercompany balances and transactions have been eliminated in consolidation. In the opinion of management, all adjustments (consisting of normal recurring adjustments and accruals) considered necessary for a fair presentation of the results of operations for the periods presented have been included in the interim periods. Operating results for the six months ended December 31, 2025 are not necessarily indicative of the results that may be expected for the fiscal year ending June 30, 2026 or any other interim period. The consolidated balance sheet at June 30, 2025 is derived from the audited financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2025.
Use of Estimates
Use of Estimates

The preparation of the consolidated financial statements in conformity with U.S. GAAP requires the Company to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses. To the extent there are material differences between these estimates and actual results, the Company's consolidated financial statements will be affected. On an ongoing basis, the Company evaluates the estimates, judgments and assumptions including those related to reserve of stock rotation returns, allowance for price adjustments, allowance for expected credit loss, inventory reserves, warranty accrual, income taxes, leases, share-based compensation, and recoverability of and useful lives for property, plant and equipment.
Recent Accounting Pronouncements
Recent Accounting Pronouncements

Recently Issued Accounting Standards not yet adopted

In December 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2023-09, “Income Taxes (Topic 740) – Improvements to Income Tax Disclosures”, which enhances the transparency, effectiveness and comparability of income tax disclosures by requiring consistent categories and greater disaggregation of information related to income tax rate reconciliations and the jurisdictions in which income taxes are paid. This will impact only the Company's disclosures for the annual reporting period ending June 30, 2026, with no impacts to its financial condition or results of operations.

In November 2024, the FASB issued ASU No. 2024-03, “Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures”, which improves disclosure requirements and provides more detailed information about an entity’s expenses, specifically amounts related to purchases of inventory, employee compensation, depreciation, intangible asset amortization, and selling expenses, along with qualitative descriptions of certain other types of expenses. This guidance is effective for fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact of the ASU on its consolidated financial statements.
In July 2025, the FASB issued ASU No. 2025-05, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets”, which provides an optional practical expedient for estimating future credit losses based on current conditions as of the balance sheet date and assuming those conditions do not change over the remaining life of the accounts receivable. The guidance will be effective for annual reporting periods beginning after December 15, 2025, and interim reporting periods within those annual reporting periods, with early adoption permitted. The Company does not expect this ASU to have a material impact on its consolidated financial statements.

In September 2025, the FASB issued ASU No. 2025-06, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software”. The ASU removes references to prescriptive software development stages and includes an updated framework for capitalizing internal software costs. The guidance will be effective for annual reporting periods beginning after December 15, 2027, and interim reporting periods within those annual reporting periods, with early adoption permitted. The Company is currently evaluating the impact of the ASU on its consolidated financial statements.

In December 2025, the FASB issued ASU No. 2025-10, “Accounting for Government Grants Received by Business Entities”. This amendment provides guidance on the recognition, measurement, and presentation of government grants. This amendment will be effective for annual reporting periods beginning after December 15, 2028, and interim reporting periods within those annual reporting periods, with early adoption permitted. The Company is currently evaluating the impact of the ASU on its consolidated financial statements.
Concentration of Credit Risk
The Company manages its credit risk associated with exposure to distributors and direct customers on outstanding accounts receivable through the application and review of credit approvals, credit ratings and other monitoring procedures. In some instances, the Company also obtains letters of credit from certain customers.

Credit sales, which are mainly on credit terms of 30 to 60 days, are only made to customers who meet the Company’s credit requirements, while sales to new customers or customers with low credit ratings are usually made on an advance payment basis. The Company considers its trade accounts receivable to be of good credit quality because its key distributors and direct customers have long-standing business relationships with the Company and the Company has not experienced any significant bad debt write-offs of accounts receivable in the past. The Company closely monitors the aging of accounts receivable from its distributors and direct customers, and regularly reviews their financial positions, where available.
v3.25.4
Net Income (Loss) Per Common Share Attributable to Alpha and Omega Semiconductor Limited (Tables)
 6 Months Ended
Dec. 31, 2025
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table presents the calculation of basic and diluted net loss per share attributable to common shareholders:
 Three Months Ended December 31,Six Months Ended December 31,
 2025202420252024
(in thousands, except per share data)
Numerator:
Net loss$(13,293)$(6,614)$(15,415)$(9,110)
Denominator:
Basic:
Weighted average number of common shares used to compute basic net loss per share29,816 29,163 29,926 29,083 
Diluted:
Weighted average number of common shares used to compute diluted net loss per share29,816 29,163 29,926 29,083 
Net loss per common share:
Basic$(0.45)$(0.23)$(0.52)$(0.31)
Diluted$(0.45)$(0.23)$(0.52)$(0.31)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
The following potential dilutive securities were excluded from the computation of diluted net loss per common share as their effect would have been anti-dilutive:
 Three Months Ended December 31,Six Months Ended December 31,
 2025202420252024
(in thousands)(in thousands)
Employee stock options and RSUs2,459 2,573 2,440 2,578 
ESPP1,500 729 914 716 
Total potential dilutive securities3,959 3,302 3,354 3,294 
v3.25.4
Concentration of Credit Risk and Significant Customers (Tables)
 6 Months Ended
Dec. 31, 2025
Risks and Uncertainties [Abstract]  
Schedules of Concentration of Risk, by Risk Factor
Summarized below are individual customers whose revenue or accounts receivable balances were 10% or higher than the respective total consolidated amounts:
Three Months Ended December 31,Six Months Ended December 31,
Percentage of revenue2025202420252024
Customer A20.9 %21.0 %21.4 %21.8 %
Customer B51.5 %52.7 %52.7 %52.1 %

 December 31,
2025		June 30,
2025
Percentage of accounts receivable
Customer A *14.9 %
Customer B 49.6 %52.3 %
v3.25.4
Balance Sheet Components (Tables)
 6 Months Ended
Dec. 31, 2025
Balance Sheet Related Disclosures [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable
Accounts receivable, net:
 December 31,
2025		June 30,
2025
(in thousands)
Accounts receivable$70,676 $75,604 
Less: Allowance for price adjustments(41,629)(40,802)
Less: Allowance for credit losses(30)(30)
Accounts receivable, net$29,017 $34,772 
Schedule of Inventory, Current
Inventories:
 December 31,
2025		June 30,
2025
(in thousands)
Raw materials$78,905 $81,341 
Work-in-process95,175 91,591 
Finished goods26,022 16,745 
 $200,102 $189,677 
Other Current Assets
Other current assets:
December 31,
2025		June 30,
2025
(in thousands)
Value-added tax receivable$577 $339 
Other prepaid expenses1,933 2,383 
Prepaid insurance2,536 3,669 
Prepaid maintenance1,405 1,990 
Deposit with supplier661 7,073 
Prepaid income tax585 336 
Interest receivable210 191 
Short term deposit709 534 
Other receivables1,756 1,700 
$10,372 $18,215 
Property, Plant and Equipment
Property, plant and equipment, net:
 December 31,
2025		June 30,
2025
(in thousands)
Land$4,877 $4,877 
Building and building improvements72,035 71,961 
Manufacturing machinery and equipment462,223 442,462 
Equipment and tooling39,184 37,918 
Computer equipment and software53,634 53,509 
Office furniture and equipment3,241 3,267 
Leasehold improvements43,727 43,901 
 678,921 657,895 
Less: accumulated depreciation and amortization(396,376)(371,836)
 282,545 286,059 
Equipment and construction in progress28,416 28,038 
Property, plant and equipment, net$310,961 $314,097 
Intangible Assets Disclosure
Intangible assets, net:
December 31,
2025		June 30,
2025
(in thousands)
Patents and technology rights$18,037 $18,037 
Software license1,181 — 
Trade name268 268 
Customer relationships1,150 1,150 
20,636 19,455 
Less: accumulated amortization(19,617)(19,455)
1,019 — 
Goodwill269 269 
Intangible assets, net$1,288 $269 
Schedule Future Amortization Expense of Intangible Assets uture amortization expense of intangible assets is as follows (in thousands):
Year ending June 30,
2026 (Remaining)$203 
2027406 
2028406 
20294
$1,019 
Schedule of Other Assets, Noncurrent
Other long-term assets:
December 31,
2025		June 30,
2025
(in thousands)
Prepayments for property and equipment$5,348 $1,973 
Customs deposit618 814 
Deposit with supplier23,342 18,080 
Office leases deposits1,082 1,358 
Other4,008 541 
 $34,398 $22,766 
Schedule of Accrued Liabilities
Accrued liabilities:
December 31,
2025		June 30,
2025
(in thousands)
Accrued compensation and benefits$23,913 $17,766 
Warranty accrual2,018 2,118 
Stock rotation accrual5,873 6,184 
Accrued professional fees2,674 3,399 
Accrued inventory1,098 1,465 
Accrued facilities related expenses2,510 2,184 
Accrued property, plant and equipment4,107 2,704 
Other accrued expenses4,623 4,755 
Customer deposits9,533 17,030 
ESPP payable1,476 1,422 
 $57,825 $59,027 
Schedule of Product Warranty Liability
The activities in the warranty accrual, included in accrued liabilities, are as follows:
Six Months Ended December 31,
20252024
(in thousands)
Beginning balance$2,118 $2,407 
Additions 833 656 
Released— (700)
Utilization(933)(403)
Ending balance$2,018 $1,960 
Stock Rotation Accrual
The activities in the stock rotation accrual, included in accrued liabilities, are as follows:
Six Months Ended December 31,
20252024
(in thousands)
Beginning balance$6,184 $4,660 
Additions7,972 4,709 
Utilization(8,283)(5,231)
Ending balance$5,873 $4,138 
Other Long-Term Liabilities
Other long-term liabilities:
 December 31,
2025		June 30,
2025
(in thousands)
Customer deposits$4,689 $7,000 
Other505 — 
Other long-term liabilities$5,194 $7,000 
v3.25.4
Bank Borrowing (Tables)
 6 Months Ended
Dec. 31, 2025
Debt Disclosure [Abstract]  
Schedule of Maturities
Maturities of short-term debt and long-term debt were as follows (in thousands):
Year ending June 30,
2026 (Remaining)
$1,462 
2027
3,095 
2028
536 
Total principal$5,093 
Short-term DebtLong-term DebtTotal
Principal amount$2,980 $2,113 $5,093 
v3.25.4
Leases (Tables)
 6 Months Ended
Dec. 31, 2025
Leases [Abstract]  
Components of Operating and Finance Lease Costs The components of the Company’s operating and finance lease expenses are as follows for the periods presented (in thousands):
Three Months Ended December 31,Six Months Ended December 31,
2025202420252024
Operating leases:
     Fixed rent expense$1,649 $1,408 $3,278 $3,145 
     Variable rent expense269 270 539 539 
Finance lease:
     Amortization of equipment129 129 257 257 
     Interest37 55 78 114 
Short-term leases
     Short-term lease expenses33 42 79 74 
               Total lease expenses$2,117 $1,904 $4,231 $4,129 
Supplemental cash flow information related to the Company’s operating and finance leases is as follows (in thousands):
Six Months Ended December 31,
20252024
Cash paid for amounts included in the measurement of lease liabilities:
     Operating cash flows from operating leases$3,375 $3,201 
     Operating cash flows from finance lease$78 $114 
     Financing cash flows from finance lease$494 $459 
Non-cash investing and financing information:
    Operating lease right-of-use assets obtained in exchange for lease obligations$5,330 $892 
Schedule of Lease Assets and Liabilities
Supplemental balance sheet information related to the Company’s operating and finance leases is as follows (in thousands, except lease term and discount rate):
December 31, 2025June 30, 2025
Operating Leases:
     Right-of-use assets associated with operating leases
$23,661 $21,288 
Finance Lease:
     Property, plant and equipment, gross$5,133 $5,133 
     Accumulated depreciation(1,941)(1,684)
          Property, plant and equipment, net$3,192 $3,449 
Weighted average remaining lease term (in years)
     Operating leases4.425.00
     Finance lease1.752.25
Weighted average discount rate
     Operating leases4.92 %4.88 %
     Finance lease7.51 %7.51 %
Schedule of Operating Lease Future Minimum Lease Payments (Topic 842)
Future minimum lease payments are as follows as of December 31, 2025 (in thousands):

Year ending June 30,Operating LeasesFinance Leases
The remainder of fiscal 2026
$3,498 $572 
2027
6,935 1,144 
2028
6,379 191 
2029
4,691 — 
2030
3,635 — 
Thereafter2,016 — 
Total minimum lease payments27,154 1,907 
Less amount representing interest(2,777)(119)
Total lease liabilities$24,377 $1,788 
Schedule of Finance Lease Future Minimum Lease Payments (Topic 842)
Future minimum lease payments are as follows as of December 31, 2025 (in thousands):

Year ending June 30,Operating LeasesFinance Leases
The remainder of fiscal 2026
$3,498 $572 
2027
6,935 1,144 
2028
6,379 191 
2029
4,691 — 
2030
3,635 — 
Thereafter2,016 — 
Total minimum lease payments27,154 1,907 
Less amount representing interest(2,777)(119)
Total lease liabilities$24,377 $1,788 
v3.25.4
Shareholders' Equity and Share-based Compensation (Tables)
 6 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement, Noncash Expense [Abstract]  
Restricted Stock Units Activity
Time-based Restricted Stock Units (“TRSUs”)

The following table summarizes the Company’s TRSU activities for the six months ended December 31, 2025:
 
Number of Time-based Restricted Stock
Units
Weighted Average
Grant Date Fair
Value Per Share		Weighted Average
Remaining
Contractual
Term (Years)		Aggregate Intrinsic Value
Nonvested at June 30, 20251,491,926 $28.50 1.66$38,282,821 
Granted200,151 $24.86 
Vested(99,671)$33.61 
Forfeited(62,540)$28.97 
Nonvested at December 31, 20251,529,866 $27.67 1.32$30,306,645 
The following table summarizes the Company’s MSUs activities for the six months ended December 31, 2025:

 
Number of Market-based Restricted Stock
Units
Weighted Average
Grant Date Fair
Value Per Share		Weighted Average
Remaining
Contractual Term
(Years)		Aggregate Intrinsic Value
Nonvested at June 30, 20251,436,000 $32.32 2.89$36,847,760 
Vested(267,500)$5.17 
Forfeited(51,000)$48.44 
Nonvested at December 31, 20251,117,500 $38.08 2.90$22,137,675 
The following table summarizes the Company’s PRSUs activities for the six months ended December 31, 2025:

 Number of Performance-based Restricted Stock
Units		Weighted Average
Grant Date Fair
Value Per Share		Weighted Average
Remaining
Contractual Term
(Years)		Aggregate Intrinsic Value
Nonvested at June 30, 2025409,563 $27.71 1.85$10,509,387 
Forfeited(1,500)$28.33 
Nonvested at December 31, 2025408,063 $27.70 1.34$8,083,728 
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions
The assumptions used to estimate the fair values of common shares issued under the ESPP were as follows:
Six Months Ended December 31,
2025
Volatility rate76.0%
Risk-free interest rate3.7%
Expected term1.3 years
Dividend yield—%
Share-based Compensation, Allocation of Recognized Period Costs
Share-based Compensation Expense
The total share-based compensation expense recognized in the Condensed Consolidated Statements of Loss for the periods presented was as follows:
Three Months Ended December 31,Six Months Ended December 31,
2025202420252024
(in thousands)(in thousands)
Cost of goods sold$1,232 $1,123 $2,297 $2,138 
Research and development2,288 2,193 4,147 4,128 
Selling, general and administrative4,753 4,634 8,961 8,586 
$8,273 $7,950 $15,405 $14,852 
v3.25.4
Segment and Geographic Information (Tables)
 6 Months Ended
Dec. 31, 2025
Segment Reporting [Abstract]  
Disaggregation of Revenue
The Company sells its products primarily to distributors in the Asia Pacific region, who in turn sell these products to end customers. Because the Company’s distributors sell their products to end customers which may have a global presence, revenue by geographical location is not necessarily representative of the geographical distribution of sales to end user markets.

The revenue by geographical location in the following tables is based on the country or region in which the products were shipped to:
Three Months Ended December 31,Six Months Ended December 31,
 2025202420252024
(in thousands)(in thousands)
Hong Kong$155,767 $150,640 $334,178 $304,135 
China2,664 15,915 5,021 37,170 
South Korea469 409 948 699 
United States1,319 699 2,444 1,772 
Other countries2,044 5,493 2,173 11,267 
 $162,263 $173,156 $344,764 $355,043 

The following is a summary of revenue by product type:
Three Months Ended December 31,Six Months Ended December 31,
 2025202420252024
 (in thousands)(in thousands)
Power discrete$100,985 $112,956 $209,491 $235,410 
Power IC58,827 53,735 131,535 106,675 
Packaging and testing services and other2,451 1,064 3,738 1,916 
License and development services— 5,401 — 11,042 
 $162,263 $173,156 $344,764 $355,043 
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas
Long-lived assets, net consisting of property, plant and equipment and operating lease right-of-use assets, net by geographical area are as follows:
 December 31,
2025		June 30,
2025
(in thousands)
China$103,267 $99,389 
United States225,494 230,518 
Other countries5,861 5,478 
 $334,622 $335,385 
v3.25.4
The Company and Significant Accounting Policies - Joint Venture (Details)
 6 Months Ended
Dec. 31, 2025
Joint Venture  
Revenues from External Customers and Long-Lived Assets  
Ownership interest, percent 18.90%
v3.25.4
The Company and Significant Accounting Policies - Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets        
Revenue $ 162,263 $ 173,156 $ 344,764 $ 355,043
Increase (Decrease) in Contract with Customer, Asset     $ 0 8,451
License and development services        
Revenues from External Customers and Long-Lived Assets        
Revenue   $ 5,401   $ 11,042
v3.25.4
Equity Method Investment in Equity Investee - Narrative (Details)
$ in Thousands, ¥ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended
Aug. 29, 2025
USD ($)
Aug. 29, 2025
CNY (¥)
Jul. 14, 2025
USD ($)
Jan. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Schedule of Equity Method Investments [Line Items]                
Proceeds from sale of equity interest in the JV Company             $ 103,239 $ 0
Equity method investment income (loss)         $ (102) $ (561) 1,287 $ (1,568)
Income (loss) on equity investment             1,100  
JV Company                
Schedule of Equity Method Investments [Line Items]                
Ownership interest 18.90% 18.90%            
Proceeds from sale of equity interest in the JV Company $ 94,500 ¥ 676 $ 150,000   $ 11,100      
Equity Method Investment, Ownership Percentage Sold     20.30%          
Income (loss) on equity investment             $ 200  
Equity Settlement Cost $ 2,400              
JV Company | Subsequent Event                
Schedule of Equity Method Investments [Line Items]                
Proceeds from sale of equity interest in the JV Company       $ 30,300        
JV Company | Scenario, Plan                
Schedule of Equity Method Investments [Line Items]                
Proceeds from sale of equity interest in the JV Company     $ 150,000          
Equity Method Investment, Ownership Percentage Sold     20.30%          
v3.25.4
Related Party Transactions (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Jun. 30, 2025
Related Party Transaction [Line Items]          
Revenue $ 162,263 $ 173,156 $ 344,764 $ 355,043  
Other receivables 1,756   $ 1,756   $ 1,700
Joint Venture          
Related Party Transaction [Line Items]          
Ownership interest, percent     18.90%    
Amount in transaction 25,100 28,200 $ 55,400 56,500  
Joint Venture | Reimbursements          
Related Party Transaction [Line Items]          
Amount in transaction 1,000 $ 3,100 1,100 $ 5,300  
Joint Venture | Other Services          
Related Party Transaction [Line Items]          
Amount in transaction 0   1,900    
Related Party          
Related Party Transaction [Line Items]          
Accounts payable $ 16,920   $ 16,920   $ 15,809
v3.25.4
Net Income (Loss) Per Common Share Attributable to Alpha and Omega Semiconductor Limited - Basic and Diluted Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Numerator:        
Net loss $ (13,293) $ (6,614) $ (15,415) $ (9,110)
Basic:        
Weighted average number of common shares used to compute basic net loss per share 29,816 29,163 29,926 29,083
Effect of potentially dilutive securities:        
Weighted average number of common shares used to compute diluted net loss per share 29,816 29,163 29,926 29,083
Net loss per common share:        
Basic (in dollars per share) $ (0.45) $ (0.23) $ (0.52) $ (0.31)
Diluted (in dollars per share) $ (0.45) $ (0.23) $ (0.52) $ (0.31)
v3.25.4
Net Income (Loss) Per Common Share Attributable to Alpha and Omega Semiconductor Limited - Potential Dilutive Shares (Details) - shares
shares in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potential dilutive securities (in shares) 3,959 3,302 3,354 3,294
Employee stock options and RSUs        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potential dilutive securities (in shares) 2,459 2,573 2,440 2,578
ESPP        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potential dilutive securities (in shares) 1,500 729 914 716
v3.25.4
Concentration of Credit Risk and Significant Customers (Details)
 3 Months Ended 6 Months Ended
Sep. 30, 2025
Dec. 31, 2025
Sep. 30, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Customer Concentration Risk | Customer A | Revenue            
Concentration Risk            
Customers greater than 10% of total   20.90%   21.00% 21.40% 21.80%
Customer Concentration Risk | Customer A | Accounts Receivable            
Concentration Risk            
Customers greater than 10% of total     14.90%      
Customer Concentration Risk | Customer B | Revenue            
Concentration Risk            
Customers greater than 10% of total   51.50%   52.70% 52.70% 52.10%
Customer Concentration Risk | Customer B | Accounts Receivable            
Concentration Risk            
Customers greater than 10% of total 49.60%   52.30%      
Minimum            
Concentration Risk            
Terms of credit sales, (in days)         30 days  
Maximum            
Concentration Risk            
Terms of credit sales, (in days)         60 days  
v3.25.4
Balance Sheet Components - Accounts Receivable (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Balance Sheet Related Disclosures [Abstract]    
Accounts receivable $ 70,676 $ 75,604
Less: Allowance for price adjustments (41,629) (40,802)
Less: Allowance for credit losses (30) (30)
Accounts receivable, net $ 29,017 $ 34,772
v3.25.4
Balance Sheet Components - Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Balance Sheet Related Disclosures [Abstract]    
Raw materials $ 78,905 $ 81,341
Work-in-process 95,175 91,591
Finished goods 26,022 16,745
Inventory, net $ 200,102 $ 189,677
v3.25.4
Balance Sheet Components - Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Balance Sheet Related Disclosures [Abstract]    
Value-added tax receivable $ 577 $ 339
Other prepaid expenses 1,933 2,383
Prepaid insurance 2,536 3,669
Prepaid maintenance 1,405 1,990
Deposit with supplier 661 7,073
Prepaid income tax 585 336
Interest receivable 210 191
Short term deposit 709 534
Other receivables 1,756 1,700
Other Assets, Current $ 10,372 $ 18,215
v3.25.4
Balance Sheet Components - Property, Plant and Equipment, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Property, Plant and Equipment    
Property, plant, and equipment excluding equipment and construction In progress, gross $ 678,921 $ 657,895
Less: accumulated depreciation and amortization (396,376) (371,836)
Property, plant and equipment excluding equipment and construction in progress, net 282,545 286,059
Equipment and construction in progress 28,416 28,038
Property, plant and equipment, net 310,961 314,097
Land    
Property, Plant and Equipment    
Property, plant, and equipment excluding equipment and construction In progress, gross 4,877 4,877
Building and building improvements    
Property, Plant and Equipment    
Property, plant, and equipment excluding equipment and construction In progress, gross 72,035 71,961
Manufacturing machinery and equipment    
Property, Plant and Equipment    
Property, plant, and equipment excluding equipment and construction In progress, gross 462,223 442,462
Equipment and tooling    
Property, Plant and Equipment    
Property, plant, and equipment excluding equipment and construction In progress, gross 39,184 37,918
Computer equipment and software    
Property, Plant and Equipment    
Property, plant, and equipment excluding equipment and construction In progress, gross 53,634 53,509
Office furniture and equipment    
Property, Plant and Equipment    
Property, plant, and equipment excluding equipment and construction In progress, gross 3,241 3,267
Leasehold improvements    
Property, Plant and Equipment    
Property, plant, and equipment excluding equipment and construction In progress, gross $ 43,727 $ 43,901
v3.25.4
Balance Sheet Components - Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Schedule of Finite-lived Intangible Assets and Goodwill    
Finite-Lived Intangible Assets, Gross $ 20,636 $ 19,455
Less: accumulated amortization (19,617) (19,455)
Total intangible assets 1,019 0
Goodwill 269 269
Intangible assets, net 1,288 269
Patents and technology rights    
Schedule of Finite-lived Intangible Assets and Goodwill    
Finite-Lived Intangible Assets, Gross 18,037 18,037
Software license    
Schedule of Finite-lived Intangible Assets and Goodwill    
Finite-Lived Intangible Assets, Gross 1,181 0
Trade name    
Schedule of Finite-lived Intangible Assets and Goodwill    
Finite-Lived Intangible Assets, Gross 268 268
Customer relationships    
Schedule of Finite-lived Intangible Assets and Goodwill    
Finite-Lived Intangible Assets, Gross $ 1,150 $ 1,150
v3.25.4
Balance Sheet Components - Future Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Balance Sheet Related Disclosures [Abstract]    
2026 (Remaining) $ 203  
2027 406  
2028 406  
2029 4  
Total intangible assets $ 1,019 $ 0
v3.25.4
Balance Sheet Components - Other Long Term Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Balance Sheet Related Disclosures [Abstract]    
Prepayments for property and equipment $ 5,348 $ 1,973
Customs deposit 618 814
Deposit with supplier 23,342 18,080
Office leases deposits 1,082 1,358
Other 4,008 541
Other long-term assets $ 34,398 $ 22,766
v3.25.4
Balance Sheet Components - Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Accrued Liabilities        
Accrued compensation and benefits $ 23,913 $ 17,766    
Warranty accrual 2,018 2,118 $ 1,960 $ 2,407
Stock rotation accrual 5,873 6,184 $ 4,138 $ 4,660
Accrued professional fees 2,674 3,399    
Accrued inventory 1,098 1,465    
Accrued facilities related expenses 2,510 2,184    
Accrued property, plant and equipment 4,107 2,704    
Other accrued expenses 4,623 4,755    
Customer deposits 9,533 17,030    
ESPP payable 1,476 1,422    
Accrued liabilities 57,825 59,027    
Customer A        
Accrued Liabilities        
Customer deposits 5,000 7,000    
Customer B        
Accrued Liabilities        
Customer deposits 1,000 2,000    
Other Customer        
Accrued Liabilities        
Customer deposits $ 3,500 $ 8,000    
v3.25.4
Balance Sheet Components - Product Warranty Accrual (Details) - USD ($)
$ in Thousands
 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease)    
Beginning balance $ 2,118 $ 2,407
Additions 833 656
Released 0 (700)
Utilization (933) (403)
Ending balance $ 2,018 $ 1,960
v3.25.4
Balance Sheet Components - Stock Rotation Accrual (Details) - USD ($)
$ in Thousands
 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Stock Rotation Accrual Increase (Decrease)    
Beginning balance $ 6,184 $ 4,660
Additions 7,972 4,709
Utilization (8,283) (5,231)
Ending balance $ 5,873 $ 4,138
v3.25.4
Balance Sheet Components - Other Long-Term Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Concentration Risk    
Customer deposits $ 4,689 $ 7,000
Other 505 0
Other long-term liabilities 5,194 7,000
Customer A    
Concentration Risk    
Customer deposits 0 5,000
Other Customers    
Concentration Risk    
Customer deposits $ 4,700 $ 2,000
v3.25.4
Bank Borrowing - Narrative (Details)
€ in Millions
 1 Months Ended 6 Months Ended
Feb. 16, 2022
USD ($)
Aug. 18, 2021
USD ($)
Aug. 09, 2019
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Jun. 30, 2024
EUR (€)
Aug. 11, 2021
USD ($)
Apr. 30, 2021
EUR (€)
Debt Instrument [Line Items]                      
Lease completion buyout option, amount               $ 1      
Long-term debt         $ 2,113,000   $ 14,872,000        
Jireh Semiconductor Incorporated | Sales-Lease Back Transaction with Jireh Semiconductor Incorporated                      
Debt Instrument [Line Items]                      
Implied interest rate       7.51% 4.75%            
Historical cost | €           € 12.0          
Down payment amount | €                     € 6.0
Down payment percent       50.00%             50.00%
Delivery payment, percent                 40.00%    
Delivery payment, amount | €                 € 4.8    
Purchase price financing, percent       10.00%              
Payments for purchase of optional hardware       $ 200,000              
Outstanding balance         $ 5,100,000            
Jireh Semiconductor Incorporated | Sales-Lease Back Transaction with Jireh Semiconductor Incorporated | Manufacturing machinery and equipment                      
Debt Instrument [Line Items]                      
Collateral amount         $ 11,300,000            
Secured Debt | Accounts Receivable Factoring Agreement August 9 2019                      
Debt Instrument [Line Items]                      
Accounts receivable factoring agreement, maximum borrowing capacity, percent of net accounts receivable     70.00%                
Accounts receivable factoring agreement, maximum borrowing capacity     $ 30,000,000.0                
Accounts Receivable Factoring Agreement, Reduction Of Maximum Borrowing Capacity                   $ 8,000,000  
Secured Debt | Jireh                      
Debt Instrument [Line Items]                      
Line of credit facility, maximum borrowing capacity   $ 45,000,000                  
Debt instrument, term   5 years 6 months                  
Amount outstanding             $ 20,300,000        
Proceeds from lines of credit $ 45,000,000                    
Hongkong And Shanghai Banking Corporation Limited | Secured Debt | Accounts Receivable Factoring Agreement August 9 2019                      
Debt Instrument [Line Items]                      
Basis spread on variable rate     201.00%                
v3.25.4
Bank Borrowing - Schedule of Debt Maturities (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Debt Disclosure [Abstract]    
2023 (Remaining) $ 1,462  
2024 3,095  
2025 536  
Total principal, less debt issuance costs 5,093  
Short-term Debt [Abstract]    
Principal amount 2,980  
Long-term Debt, Unclassified [Abstract]    
Principal amount 2,113  
Total debt, less debt issuance costs $ 2,113 $ 14,872
v3.25.4
Leases - Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Debt Instrument [Line Items]    
Operating lease liability $ 24,377  
Right-of-use assets associated with operating leases 23,661 $ 21,288
Property, plant and equipment, gross $ 5,133 $ 5,133
v3.25.4
Leases - Schedule of Operating and Finance Lease Expenses (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Operating leases:        
Fixed rent expense $ 1,649 $ 1,408 $ 3,278 $ 3,145
Variable rent expense 269 270 539 539
Finance lease:        
Amortization of equipment 129 129 257 257
Interest 37 55 78 114
Short-term leases        
Short-term lease expenses 33 42 79 74
Total lease expenses $ 2,117 $ 1,904 $ 4,231 $ 4,129
v3.25.4
Leases - Supplemental Balance Sheet Information (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Operating Leases:    
Right-of-use assets associated with operating leases $ 23,661 $ 21,288
Finance Lease:    
Property, plant and equipment, gross 5,133 5,133
Accumulated depreciation (1,941) (1,684)
Property, plant and equipment, net $ 3,192 $ 3,449
Weighted average remaining lease term (in years)    
Operating leases 4 years 5 months 1 day 5 years
Finance lease 1 year 9 months 2 years 3 months
Weighted average discount rate    
Operating leases 4.92% 4.88%
Finance lease 7.51% 7.51%
v3.25.4
Leases - Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows from operating leases $ 3,375 $ 3,201
Operating cash flows from finance lease 78 114
Financing cash flows from finance lease 494 459
Operating lease right-of-use assets obtained in exchange for lease obligations $ 5,330 $ 892
v3.25.4
Leases - Future Minimum Lease Payments (Topic 842) (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
Operating Leases  
The remainder of fiscal 2026 $ 3,498
2024 6,935
2025 6,379
2026 4,691
2027 3,635
Thereafter 2,016
Total minimum lease payments 27,154
Less amount representing interest (2,777)
Total Operating Lease Liability 24,377
Finance Leases  
The remainder of fiscal 2026 572
2024 1,144
2025 191
2026 0
2027 0
Thereafter 0
Total minimum lease payments 1,907
Less amount representing interest (119)
Total Finance Lease Liability $ 1,788
v3.25.4
Shareholders' Equity and Share-based Compensation - Shares Repurchase (Details) - USD ($)
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Nov. 30, 2025
Class of Stock [Line Items]          
Treasury stock acquired, average price per share (in dollars per share) $ 19.12        
Share-based compensation expense $ 8,273,000 $ 7,950,000 $ 15,405,000 $ 14,852,000  
Stock Repurchased and Retired During Period, Shares 728,373   728,373    
Stock Repurchased During Period, Value $ 14,096,000   $ 14,096,000    
Stock Repurchased During Period Net of Related Fees, Value 13,900,000   13,900,000    
Repurchase Program          
Class of Stock [Line Items]          
Shares repurchase program, remaining balance $ 16,100,000   $ 16,100,000   $ 30,000,000
v3.25.4
Shareholders' Equity and Share-based Compensation - Time-based Restricted Stock Activity (Details) - USD ($)
 6 Months Ended
Jun. 30, 2025
Dec. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Weighted average remaining recognition period (in years)   2 years
Restricted Stock    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Nonvested at beginning of period (in shares)   1,491,926
Granted (in shares)   200,151
Vested (in shares)   (99,671)
Forfeited (in shares)   (62,540)
Nonvested at end of period (in shares) 1,491,926 1,529,866
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Nonvested at beginning of period (in dollars per share)   $ 28.50
Granted (in dollars per share)   24.86
Vested (in dollars per share)   33.61
Forfeited (in dollars per share)   28.97
Nonvested at end of period (in dollars per share $ 28.50 $ 27.67
Weighted average remaining recognition period (in years) 1 year 7 months 28 days 1 year 3 months 25 days
Aggregate Intrinsic Value $ 38,282,821 $ 30,306,645
v3.25.4
Shareholders' Equity and Share-based Compensation - Market-based Restricted Stock Units Narrative (Details) - USD ($)
 3 Months Ended 6 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2021
Sep. 30, 2018
Dec. 31, 2025
Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation expense     $ 8,273,000 $ 7,950,000     $ 15,405,000 $ 14,852,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]                
Weighted average remaining recognition period (in years)             2 years  
2018 Market-based Restricted Stock Units (MSU)                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]                
Granted (in shares)           1,300,000    
Market-based Restricted Stock Units (MSU)                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation expense     $ 1,200,000 $ 1,600,000     $ 2,700,000 $ 2,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]                
Nonvested at beginning of period (in shares)             1,436,000  
Vested (in shares)             (267,500)  
Forfeited (in shares)             (51,000)  
Nonvested at end of period (in shares)   1,436,000 1,117,500       1,117,500  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]                
Nonvested at beginning of period (in dollars per share)             $ 32.32  
Vested (in dollars per share)             5.17  
Forfeited (in dollars per share)             48.44  
Nonvested at end of period (in dollars per share   $ 32.32 $ 38.08       $ 38.08  
Weighted average remaining recognition period (in years) 2 years 10 months 24 days 2 years 10 months 20 days            
Aggregate Intrinsic Value   $ 36,847,760 $ 22,137,675       $ 22,137,675  
2021 Market-based Restricted Stock Units (MSU)                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]                
Granted (in shares)         1,000,000      
v3.25.4
Shareholders' Equity and Share-based Compensation - Performance-based Restricted Stock Units (Details) - USD ($)
 3 Months Ended 6 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense     $ 8,273,000 $ 7,950,000 $ 15,405,000 $ 14,852,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]            
Weighted average remaining recognition period (in years)         2 years  
Performance Based Restricted Stock Units (PRSUs) Member            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense     $ 1,100,000 $ 1,000,000 $ 2,300,000 $ 1,900,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]            
Nonvested at beginning of period (in shares)         409,563  
Forfeited (in shares)         (1,500)  
Nonvested at end of period (in shares)   409,563 408,063   408,063  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]            
Nonvested at beginning of period (in dollars per share)         $ 27.71  
Forfeited (in dollars per share)         28.33  
Nonvested at end of period (in dollars per share   $ 27.71 $ 27.70   $ 27.70  
Weighted average remaining recognition period (in years) 1 year 4 months 2 days 1 year 10 months 6 days        
Aggregate Intrinsic Value   $ 10,509,387 $ 8,083,728   $ 8,083,728  
v3.25.4
Shareholders' Equity and Share-based Compensation - Employee Share Purchase Plan (Details) - ESPP
 6 Months Ended
Dec. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Volatility rate 76.00%
Risk-free interest rate 3.70%
Expected term 1 year 3 months 18 days
Dividend yield 0.00%
v3.25.4
Shareholders' Equity and Share-based Compensation - Share-based Compensation (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Sep. 30, 2018
Dec. 31, 2025
Dec. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense $ 8,273 $ 7,950   $ 15,405 $ 14,852
2018 Market-based Restricted Stock Units (MSU)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)     1,300,000    
Performance Based Restricted Stock Units (PRSUs) Member          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense $ 1,100 $ 1,000   $ 2,300 $ 1,900
v3.25.4
Shareholders' Equity and Share-based Compensation - Share-based Compensation Expenses (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based compensation expense $ 8,273 $ 7,950 $ 15,405 $ 14,852
Unrecognized compensation expense 48,000   $ 48,000  
Recognition period of share-based compensation expense (in years)     2 years  
Cost of goods sold        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based compensation expense 1,232 1,123 $ 2,297 2,138
Research and development        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based compensation expense 2,288 2,193 4,147 4,128
Selling, general and administrative        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based compensation expense $ 4,753 $ 4,634 $ 8,961 $ 8,586
v3.25.4
Income Taxes - Narrative (Details)
$ in Thousands, ¥ in Millions
 3 Months Ended 6 Months Ended
Aug. 29, 2025
USD ($)
Aug. 29, 2025
CNY (¥)
Jul. 14, 2025
USD ($)
Dec. 31, 2025
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Effective Income Tax Rate Reconciliation [Line Items]                
Income tax expense       $ 1,490   $ 1,242 $ 3,417 $ 2,282
Discrete income tax expense       100   100    
Income tax expense net of discrete tax expense       1,400   $ 1,200 3,300 2,100
Unrecognized tax benefits       10,800     10,800  
Unrecognized tax benefit that would impact effective tax rate       $ 7,500     7,500  
Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount             $ 700 $ 200
Effective Income Tax Rate Reconciliation Excluding Discrete Taxes, Percent,       12.00%   22.10% 27.30% 31.40%
Increase in income taxes payable             $ 2,730 $ 277
Proceeds from sale of equity interest in the JV Company             103,239 0
Increase (Decrease) in Deferred Income Taxes             $ 8,342 $ (346)
JV Company                
Effective Income Tax Rate Reconciliation [Line Items]                
Increase in income taxes payable         $ 10,400      
Equity Method Investment, Ownership Percentage Sold     20.30%          
Proceeds from sale of equity interest in the JV Company $ 94,500 ¥ 676 $ 150,000 $ 11,100        
Increase (Decrease) in Deferred Income Taxes         $ (10,500)      
Income Taxes Paid       $ 8,700        
JV Company | Scenario, Plan                
Effective Income Tax Rate Reconciliation [Line Items]                
Equity Method Investment, Ownership Percentage Sold     20.30%          
Proceeds from sale of equity interest in the JV Company     $ 150,000          
v3.25.4
Segment and Geographic Information - Narratives (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets        
Revenue $ 162,263 $ 173,156 $ 344,764 $ 355,043
v3.25.4
Segment and Geographic Information - Revenue by Location and Product Type (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets        
Revenue $ 162,263 $ 173,156 $ 344,764 $ 355,043
Power discrete        
Revenues from External Customers and Long-Lived Assets        
Revenue 100,985 112,956 209,491 235,410
Power IC        
Revenues from External Customers and Long-Lived Assets        
Revenue 58,827 53,735 131,535 106,675
Packaging and testing services and other        
Revenues from External Customers and Long-Lived Assets        
Revenue 2,451 1,064 3,738 1,916
License and development services        
Revenues from External Customers and Long-Lived Assets        
Revenue   5,401   11,042
Hong Kong        
Revenues from External Customers and Long-Lived Assets        
Revenue 155,767 150,640 334,178 304,135
China        
Revenues from External Customers and Long-Lived Assets        
Revenue 2,664 15,915 5,021 37,170
South Korea        
Revenues from External Customers and Long-Lived Assets        
Revenue 469 409 948 699
United States        
Revenues from External Customers and Long-Lived Assets        
Revenue 1,319 699 2,444 1,772
Other countries        
Revenues from External Customers and Long-Lived Assets        
Revenue $ 2,044 $ 5,493 $ 2,173 $ 11,267
v3.25.4
Segment and Geographic Information - Long-lived Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jun. 30, 2025
Revenues from External Customers and Long-Lived Assets    
Property, plant and equipment, net and land use rights, net $ 334,622 $ 335,385
China    
Revenues from External Customers and Long-Lived Assets    
Property, plant and equipment, net and land use rights, net 103,267 99,389
United States    
Revenues from External Customers and Long-Lived Assets    
Property, plant and equipment, net and land use rights, net 225,494 230,518
Other countries    
Revenues from External Customers and Long-Lived Assets    
Property, plant and equipment, net and land use rights, net $ 5,861 $ 5,478
v3.25.4
Commitments and Contingencies - Purchase Commitments (Details)
$ in Millions
Dec. 31, 2025
USD ($)
Raw materials, wafers, and packaging and testing services puchase commitments  
Purchase Commitment, Excluding Long-term Committment [Line Items]  
Purchase commitment, amount $ 61.0
Property and equipment purchase commitments  
Purchase Commitment, Excluding Long-term Committment [Line Items]  
Purchase commitment, amount $ 17.3
v3.25.4
Commitments and Contingencies - Contingencies and Indemnities (Details) - USD ($)
Dec. 31, 2025
Jun. 30, 2025
Indemnification Agreement    
Loss Contingencies [Line Items]    
Indemnifications accrual $ 0 $ 0